Improvement in cultivators



y of the tooth by a safety-coupling, b.

,zi time itiuit WW1-satema @anni fin JAMES HARRIS, OF JApNESvILLE,WISCONSIN.

Lette/rs'late'nt No. 87,101, dated February 23, 1 y 69.

The Schedule referred to these Letters Patent and making part of thelame.

To all whom it may concern;

Be it known that I, J AMES HARRIS, of the city of Janesville, in thecounty of Rock, and State of Wisconsin, have invented certain new anduseful Improvements in Onltivators and I do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanyin g drawings. mak: ing a part of thisspecification, in which- Figure lis a side view or elevation of thedragbarand tooth or shovel of .a cnltivator, as I construct them, Aandas they appear when in use;

Figure 2 is also a side view or elevation of the same as they appearwhen the cultivator is backing;

Figure 3 is a longitudinal vertical section of the same as they appearwhen the tooth has been released by coming in contact with anobstruction; and

Figure 4 is a top view of a -portion of two drag-bars, showing theirposition in connection with the draughtrod.

The nature of my invention relates to the teeth and drag-bars ofcnltivators, and consists- First, in connecting the shank of the toothto an independent circle-iron, when constructed and used in connectionwith the drag-bar, substantially as and for the purpose hereinafterdescribed.

Second, in joining the drag-bar to the draughtrod, by means of anelongated metallic box-bearing, substantially as and for the purposehereinafter described.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

In the drawings- A represents a drag-bar, of wood, or other suitablematerial;

B, the tooth;

C, the circle-iron; and

D, the elongated metallic box joining the drag-bar A to the draught-rodK, fig. 4.

The tooth at the end of the shank, and the circleiron at its upper end,have a common bearing on the pivot-pin a that passes through thedrag-bar.

The lower end ofthe circle-iron is joined to the shank Thissafety-coupling consists of a simple bolt passing through the shank, andalso through a slot, c, in the circle-iron.

' On the end of the bolt is a washer, larger than the width of the slot,and a nut to clamp them together.

The nut may be in the circle-iron andthe slot in a flange or short earon the shank, if desired, or a boltstaple in the shank, clasping aroundthe circle-iron, and dispensing with the slot, may be used.

'Io set the teeth, or to give them the desired pitch,

or inclination, I pierce the circle-iron with a series of holes, d,through either of which the setting-device E may be secured.

This setting-device may consist ot' the -bolt and square-faced' lugs, asshown, or of the simple pin l, shown in iig; 3. In the latter case, theupper face of the drag-bar (if of wood) should be covered with ametallic plate, to prevent the pin from indenting the woo l.

The elongated box-bearing D should be of cast-iron, of the form shown,in which case the forward end of the drag-bar should be slotted toreceive it, and the same secured therein by a bolt, f, passing throughthe flange h.

The box is bored or cast with orlnce e, so as to nicely fit on thedraught-rod K, g. 4, and extends beyond the drag-bar, on either side,one-half of the Width of the space between the bars.

The positionfof the drag-bars on the draught-rod, and the oice of theelongated box-bearing, are shown in iig. 4. v

As heretofore joined to the draught-rod, it hasbeen impossible to keepthe drag-bars (and teeth) in line, as, owing to their short bearing onthe draught-rod, they were constantly swinging and swaying sidewise.

As heretofore constructed, it has been the custom, in order to keep thebars the proper distance apart, tc fill the space between them onthedraught-rodlwith washers.

To avoid the use of washers, and to keep them securely in line, bygiving them a broad, firm bearing on the rod, I employ the elongatedmetallic box described.

It is not essential to my invention that the box D should be inserted ina slot in the drag-bar, as the same results may be accomplished bybolting it underneath or on the top of the bar, or by constructing it insections and bolting them upon the sides thereof.

It will be seen that the adjustable settingedevice E secures withoutchange, when once set, the pitch or inclination of the teeth, and allowsthem to swing forward, as shown in fig. 2, when the cultivator isbacked.

It willalso be seen that the safety-coupling?) holds the teeth with anadjustable force, and when once the tooth is drawn back by anobstruction, the short distance necessary to withdraw the bolt from theslot c, the tooth is not still held by the coupling, but is entirelyfree; also, that the freeing or loosening of the tooth does notaffectthe previous setting of l'its pitch or inclination, which remainsunchanged, however often the tooth maybe loosened.

What I claim, is-

1. The detached or independent circle-iron O.

2. The arrangement of the detached circle-iron O withthe tooth B,whereby both have a common bearing on the pivot-pin a, substantially asdescribed.

3. The combination of the tooth B,eiro1eiron (Land 6. Joining thedrag-bars to the draught-rod by coupling-device b, substantially asdescribed. means of the elongated metallic box D, whereby e 4. Thearrangement-0f the tooth B, independent broad,1'm bearing is secured,and washers between circle-iron C, setting-device E, and drag-bar A,subthe bars dispensed withfsubsteutielly as described. stentiaily as andfor the purpose described. JAMES HARRIS,

5. The combination and arrangement of the tooth B and independentcircle-iron C, when joined by the WIHESSGS:

coupling-device b, and`having t common bearing, a, SYLVANUS D. LOOKE,with the'dregfbu-r A and settingdevice E, or pin l, OBED DANN.substantially as described.

